./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 ...................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 04:04:52,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:04:52,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:04:52,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:04:52,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:04:52,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:04:52,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:04:52,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:04:52,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:04:52,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:04:52,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:04:52,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:04:52,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:04:52,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:04:52,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:04:52,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:04:52,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:04:52,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:04:52,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:04:52,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:04:52,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:04:52,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:04:52,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:04:52,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:04:52,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:04:52,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:04:52,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:04:52,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:04:52,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:04:52,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:04:52,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:04:52,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:04:52,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:04:52,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:04:52,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:04:52,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:04:52,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:04:52,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:04:52,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:04:52,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:04:52,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:04:52,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-26 04:04:52,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:04:52,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:04:52,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:04:52,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:04:52,537 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:04:52,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:04:52,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:04:52,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:04:52,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:04:52,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 04:04:52,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 04:04:52,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 04:04:52,539 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-26 04:04:52,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:04:52,540 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:04:52,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 04:04:52,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:04:52,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:04:52,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 04:04:52,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 04:04:52,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 04:04:52,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:04:52,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 04:04:52,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 04:04:52,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:04:52,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 04:04:52,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 04:04:52,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:04:52,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 [2020-10-26 04:04:52,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:04:52,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:04:52,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:04:52,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:04:52,995 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:04:52,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-10-26 04:04:53,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb0036084/40307cda170c44e8b45c1ee615310733/FLAGea8e01a52 [2020-10-26 04:04:53,635 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:04:53,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-10-26 04:04:53,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb0036084/40307cda170c44e8b45c1ee615310733/FLAGea8e01a52 [2020-10-26 04:04:53,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb0036084/40307cda170c44e8b45c1ee615310733 [2020-10-26 04:04:53,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:04:53,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:04:53,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:04:53,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:04:53,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:04:53,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:04:53" (1/1) ... [2020-10-26 04:04:53,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1e6423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:53, skipping insertion in model container [2020-10-26 04:04:53,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:04:53" (1/1) ... [2020-10-26 04:04:53,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:04:54,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:04:54,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:04:54,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:04:54,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:04:54,163 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:04:54,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54 WrapperNode [2020-10-26 04:04:54,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:04:54,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:04:54,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:04:54,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:04:54,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:04:54,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:04:54,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:04:54,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:04:54,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... [2020-10-26 04:04:54,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:04:54,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:04:54,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:04:54,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:04:54,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 04:04:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:04:54,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:04:54,517 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:04:54,518 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 04:04:54,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:04:54 BoogieIcfgContainer [2020-10-26 04:04:54,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:04:54,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 04:04:54,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 04:04:54,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 04:04:54,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 04:04:53" (1/3) ... [2020-10-26 04:04:54,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271a6dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 04:04:54, skipping insertion in model container [2020-10-26 04:04:54,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:04:54" (2/3) ... [2020-10-26 04:04:54,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271a6dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 04:04:54, skipping insertion in model container [2020-10-26 04:04:54,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:04:54" (3/3) ... [2020-10-26 04:04:54,530 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-10-26 04:04:54,545 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 04:04:54,551 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-26 04:04:54,567 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-26 04:04:54,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 04:04:54,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 04:04:54,605 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 04:04:54,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:04:54,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:04:54,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 04:04:54,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:04:54,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 04:04:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-26 04:04:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-26 04:04:54,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 04:04:54,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-26 04:04:54,631 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-26 04:04:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:04:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash 959367, now seen corresponding path program 1 times [2020-10-26 04:04:54,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:04:54,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931971124] [2020-10-26 04:04:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:04:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:04:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:04:54,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931971124] [2020-10-26 04:04:54,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:04:54,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 04:04:54,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881951724] [2020-10-26 04:04:54,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 04:04:54,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:04:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 04:04:54,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-26 04:04:54,868 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2020-10-26 04:04:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:04:54,981 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-10-26 04:04:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 04:04:54,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-10-26 04:04:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 04:04:55,004 INFO L225 Difference]: With dead ends: 21 [2020-10-26 04:04:55,004 INFO L226 Difference]: Without dead ends: 8 [2020-10-26 04:04:55,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-26 04:04:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-26 04:04:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-10-26 04:04:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-26 04:04:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-10-26 04:04:55,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2020-10-26 04:04:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 04:04:55,074 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-26 04:04:55,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 04:04:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2020-10-26 04:04:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-26 04:04:55,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 04:04:55,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-26 04:04:55,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 04:04:55,078 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-26 04:04:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:04:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash 29740420, now seen corresponding path program 1 times [2020-10-26 04:04:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:04:55,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871547462] [2020-10-26 04:04:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:04:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:04:55,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:04:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:04:55,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:04:55,131 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:04:55,131 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 04:04:55,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 04:04:55,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 04:04:55 BoogieIcfgContainer [2020-10-26 04:04:55,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 04:04:55,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:04:55,154 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:04:55,155 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:04:55,155 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:04:54" (3/4) ... [2020-10-26 04:04:55,158 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-26 04:04:55,199 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 04:04:55,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:04:55,203 INFO L168 Benchmark]: Toolchain (without parser) took 1237.37 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 30.0 MB in the beginning and 32.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-10-26 04:04:55,204 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 37.7 MB. Free memory was 18.2 MB in the beginning and 18.1 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:04:55,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.20 ms. Allocated memory is still 46.1 MB. Free memory was 29.4 MB in the beginning and 21.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-26 04:04:55,205 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 46.1 MB. Free memory was 20.9 MB in the beginning and 31.6 MB in the end (delta: -10.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-26 04:04:55,206 INFO L168 Benchmark]: Boogie Preprocessor took 31.93 ms. Allocated memory is still 46.1 MB. Free memory was 31.6 MB in the beginning and 30.8 MB in the end (delta: 818.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:04:55,207 INFO L168 Benchmark]: RCFGBuilder took 268.01 ms. Allocated memory is still 46.1 MB. Free memory was 30.7 MB in the beginning and 22.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-26 04:04:55,208 INFO L168 Benchmark]: TraceAbstraction took 631.56 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.8 MB in the beginning and 34.0 MB in the end (delta: -12.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:04:55,209 INFO L168 Benchmark]: Witness Printer took 45.34 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 32.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:04:55,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.81 ms. Allocated memory is still 37.7 MB. Free memory was 18.2 MB in the beginning and 18.1 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 195.20 ms. Allocated memory is still 46.1 MB. Free memory was 29.4 MB in the beginning and 21.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 46.1 MB. Free memory was 20.9 MB in the beginning and 31.6 MB in the end (delta: -10.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.93 ms. Allocated memory is still 46.1 MB. Free memory was 31.6 MB in the beginning and 30.8 MB in the end (delta: 818.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 268.01 ms. Allocated memory is still 46.1 MB. Free memory was 30.7 MB in the beginning and 22.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 631.56 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.8 MB in the beginning and 34.0 MB in the end (delta: -12.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 45.34 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 32.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, oldx; [L24] x = __VERIFIER_nondet_int() [L25] oldx = __VERIFIER_nondet_int() [L26] x > 1 && -2*x == oldx [L26] -2*x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 16 SDslu, 3 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...